A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Just another drop in the bucket here.
Excel has been doing this to me somewhat rarely for the last 2 years (5-10 times a month rough average). I ignored it for a while as I only use excel for very basic spreadsheets but after deciding to look it up I realized it was a much bigger (and older) problem. I can't believe Microsoft hasn't deigned to comment on this issue yet. Now I am curious to see how long we can keep this thread up.